A microwave oven heats food in a process called dielectric heating. The molecules in the food, primarily water molecules, are polar molecules - meaning they have both a positive and a negative pole due to the distribution of positive and negative charges on the atoms. When they are subjected to microwaves, the molecules rotate as to align themselves with the electromagnetic field, much like a compass aligning itself with the magnetic field of the Earth. Microwave ovens alternate the electromagnetic field to reverse the polarity, causing the molecules to then rotate the other way. Using the compass analogy, imagine taking a magnet and doing circles around the compass; the needle goes crazy. This excited rotation of (mostly) water molecules generates molecular friction with other surrounding excited molecules, generating heat.
A common misconception is that the molecules have resonance with the particular frequency used by a microwave oven; ovens that use different frequencies can cook just as efficiently. Another misconception regards the safety of microwave ovens and their radiation. The radiation used in a microwave oven is in the form of radio waves; this is non-ionizing radiation, meaning it is not the same kind of radiation that can cause cancer; that kind of radiation is called ionizing radiation - sunlight and nuclear radiation are examples. Therefore, a microwave oven's radiation cannot cause cancer or other ionizing effects. It's also commonly believed that standing too close to a microwave oven can be harmful, but this is not true. A microwave oven acts like a Faraday cage; the holes in the metal grill that's visible through the oven door are essentially invisible to the radio waves, thanks to their wavelength, so most of the energy is reflected back into the oven. Other sources of microwave radiation, such as cell phones, cannot heat objects like a microwave for two reasons: The relative power of the transmission, and the fact that a microwave oven concentrates nearly all of the energy into the food, whereas a cell phone's transmissions dissipate in all directions, leaving the tiniest fractions of that energy to be absorbed by the body.
It heats up and thaws the food that you have placed in the microwave
It is not recommended to put tin foil in the microwave as it can cause sparks and possibly damage the microwave. It is safer to use microwave-safe dishes and utensils when heating food in the microwave.
Actually three special purpose vacuum tubes were specifically designed for microwave usage and are in some cases still the least expensive way to work with high power microwave signals.These vacuum tubes are:cavity magnetron (first designed in WW2 for use in military RADARs, still used in some RADAR systems and as the microwave radiation source in all microwave cookers)klystron (still used in satellite communication, medical microwave equipment, and particle accelerators)traveling wave tube (still used in satellite communication, RADAR systems, and the electromagnetic compatibility (EMC) testing industry for immunity testing of electronic devices)
No, microwave ovens do not emit ultraviolet (UV) radiation. They use microwave radiation to heat and cook food by causing water molecules in the food to vibrate, generating heat. UV radiation is not involved in the operation of microwave ovens.
A molecule is considered microwave active if it has a net dipole moment resulting from the uneven distribution of charges within the molecule. This uneven distribution causes the molecule to rotate and absorb microwave radiation. In contrast, molecules that are symmetric and have a zero net dipole moment are considered microwave inactive because they do not interact with microwave radiation.
No, a microwave does not store electricity when turned off. When the microwave is turned off, the electrical circuit is broken, and there is no stored electricity within the appliance.
No, a microwave will not work as a Faraday cage.
I had to buy a new microwave because my old one didn't work.
They work relatively well although it is easier to use just a microwave or just an oven.
No.
Nothing because the microwave does not work when thy door is open.
No, a microwave oven would not work in space because microwaves rely on the presence of air molecules to transmit heat to the food. In the vacuum of space, there are no air molecules to heat up the food, so the microwave would not function properly.
Any microwave cleaner will work well, or you can just use water and a damp rag,
Any kind of nook will work as long it has a stud or surface that will support the weight of the microwave.
Jobs related to microwaves include microwave engineer, microwave technician, and microwave product development engineer. These professionals work on designing, testing, and troubleshooting microwave devices and systems such as microwave ovens, radar systems, and satellite communication systems.
The same as it does for visible light.
A compact countertop like the Sharp R930AW Countertop Microwave would work great for a dorm.
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